【Materials】: This socket adapters kit is made of high quality chrome molybdenum steel with heat treatment, which makes it resistant to corrosion and rust to provide you with durability. 【Components Included】: This adapter set consists of 8 different sized tools from 1" to 3/4", 3/4" to 1/2", 1/2" to 3/8", 3/8" to 1/4", 1/4" to 3/8", 3/8" to 1/2", 1/2" to 3/4", 3/4" to 1" to meet your various needs. 【Scope of Application】: This socket adapter set is suitable for multiple occasions like home, workshop, garage, factory, DIY, etc.And hardened and tempered, it can serve as a professional tool for commercial or occasional use. 【Storage and Transport】: This socket adapter set is well packaged and well organized in a storage box, making it easy for you to store and carry.And the size of each socket is printed on the body of the socket itself, making them easy to identify after removing a handful from the case. Chamfered opening: quickly aligns the fastener to the socket